CP-3800 GC Operator’s Manual
49
Sample Introduction
Sample introduction devices refer to the hardware used to introduce the
sample into the Gas Chromatograph. These include liquid injectors, gas
sampling valves and liquid sampling valves. This section also covers the
pneumatic systems associated with the various sample introduction systems.
The various pneumatic systems are described with the individual sample
introduction systems.
Liquid Injectors
There are four liquid injectors available on the 3800 Gas Chromatograph:
1. The
CP-1177 Split/Splitless Capillary Injector
is optimized especially
for split and splitless injections. The injector is designed to accept a
variety of inserts allowing tailored configurations for either the Split or
Splitless injection method.
2. The
1079 Universal Capillary Injector
can be used in a variety of
sampling modes including isothermal split and splitless, temperature
ramped splitless, on-column and large volume injection. The 1079 can
be temperature programmed and cooled by cryogenics.
3. The
1041 On-Column Injector
is designed for use with largebore
capillary columns or packed columns. The standard injector is supplied
with an adapter for largebore capillary columns. Optional adapter kits
are available for 1/8" and 1/4" packed columns.
4. The
1061 Flash Vaporization Injector
is also designed for use with
largebore capillary or packed columns. This injector uses a glass insert
inside the injector body. The standard injector is supplied with an insert
for use with largebore capillary columns. Optional adapters are available
for 1/8" and 1/4" packed columns.
Sampling Valves
The 3800 can be configured with a wide variety of gas and liquid sampling
valves. These sampling valves can be unheated or installed in a valve oven.
Typically a sampling valve is installed in series with a liquid injector and thus
shares the pneumatic system of the injector, but valves can also be installed
with their own pneumatic systems. Optional actuators are available to
automate the function on the sampling valves. In addition to sampling
valves, Varian also supplies a large number of switching valve
configurations.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
